If a well produces 107 gpm with a drawdown of 22.5 ft, what is the specific yield in gpm/ft?

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Multiple Choice

If a well produces 107 gpm with a drawdown of 22.5 ft, what is the specific yield in gpm/ft?

Explanation:
Specific yield is the discharge you get for each foot the water level drops during pumping. You find it by dividing the flow rate by the drawdown. So, 107 gpm divided by 22.5 ft equals about 4.76 gpm/ft. Among the given options, 4.86 gpm/ft is the closest to that calculation, so it’s the best match. This value helps gauge how much water the well can deliver per foot of drawdown, informing well performance and aquifer behavior.

Specific yield is the discharge you get for each foot the water level drops during pumping. You find it by dividing the flow rate by the drawdown. So, 107 gpm divided by 22.5 ft equals about 4.76 gpm/ft. Among the given options, 4.86 gpm/ft is the closest to that calculation, so it’s the best match. This value helps gauge how much water the well can deliver per foot of drawdown, informing well performance and aquifer behavior.

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